WWI Imperial Postcards Help

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Here are seven more I scanned. I believe six of them have writing and cancellation stamps on the reverses, so I've scanned those as well.

Thanks,
Gary

PC-6

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PC-6 Reverse

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PC-7

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PC-7 Reverse

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This card is interesting for the fact it looks like these men are sitting inside their bunker? Pots, pans and equipment hanging on the wall and overall darkness. The card appears to have been carried in a pocket.

PC-8

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PC-8, Reverse

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PC-9

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PC-9 Reverse

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As you can see, this card is a smaller image on half the card and is dirty. Is there any way to clean these? It looks like the grime comes off with a little rubbing, but I don't want to damage it.

PC-10

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Here's a closeup of the men in the image.

PC-10 Close

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PC-10 Reverse

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This is about the nicest card of the bunch. High quality in every respect. The boy on the horse has a chalkboard with what appears to be "Parole: 12. Feiglein" written on it. Nothing on the reverse but postcard lines.

PC-11

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"True Comrades!"

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Last card today. The chalkboard states: Treue Kameraden Welt-Krieg 1914-16. The soldier on the left has lace up boots? Which soldier's wore these?

Thanks again for any information you all can provide on these.

Gary

PC-12

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PC-12 Reverse